A complete guide to every song and piano cover featured on 'Westworld'

During its freshman season, HBO's "Westworld" cemented the use of a player piano as one of many iconic features in its ambitious sci-fi/western drama series. Co-creators Jonathan Nolan and Lisa Joy worked with composer Ramin Djawadi to embed anachronistic musical cues into the (mostly) Western setting via the player piano and other soundtrack choices.

Whether you're looking for the name of a song used, or want to better understand the show's musical themes, keep reading for a look at every song featured on "Westworld."

We'll update this guide each week. As of now, this article contains spoilers for events through season two, episode two.

1/

"Black Hole Sun" by Soundgarden

Season 1, Episode 1: "The Original"
John P. Johsnon/HBO

The show's first use of a modern song on the player piano happens a little over halfway through the pilot episode. As Maeve is closing up the Marisposa and just before Kissy is taken by William, "Black Hole Sun" plays on the piano.

2/

"Paint it Black" by The Rolling Stones

Season 1, Episode 1: "The Original"
John P. Johnson/HBO

During our first introduction to Hector, Armistice, and their crew of bandit hosts, composer Ramin Djawadi's piano-based cover of "Paint it Black" plays.

3/

"No Surprises" by Radiohead

Season 1, Episode 2: "Chestnut."
John P. Johnson/HBO

Maeve begins experiencing small malfunctions as she tries seducing customers in the Mariposa saloon. Radiohead's "No Surprises" plays in the background of two key encounters.

4/

"Rêverie" by Claude Debussy

Season 1, Episode 3: "The Stray"
HBO

When we see Dr. Robert Ford's office for the first time, a host in the corner plays "Rêverie" by Debussy. The coding Ford had added to the hosts on the first episode was called "Reveries." This was our first introduction to this very important choice of song (but more on that in a bit).

5/

"A Forest" by The Cure

Season 1, Episode 4: "Dissonance Theory."
John P. Johnson/HBO

During the episode's opening scenes with Maeve, "A Forest" plays as she struggles to operate regularly. As is often the case with the song selection, the lyrics to this song were relevant to Maeve's inexplicable experiences of seeing her host-daughter and becoming disoriented.

6/

"Habanera" from the Carmen Suite No. 2 opera

Season 1, Episode 4: "Dissonance Theory."
John P. Johnson/HBO

At the end of the fourth episode on season one, Hector and his bandits rob the Mariposa saloon again. But this iconic opera song plays instead of the "Paint it Black" cover.

7/

"Something I Can Never Have" by Nine Inch Nails

Season 1, Episode 5: "Contrapasso"
HBO

When Logan, William, and Dolores find themselves planted in the middle of giant orgy in Pariah, this ominous Nine Inch Nails from Ramin Djawadi cover plays.

8/

"Claire de Lune" by Claude Debussy

Season 1, Episode 5: "Contrapasso"
HBO

This song first plays as a quiet guitar cover when Dolores and William are walking through Pariah. But it comes back in full force later when Ford is playing the piano in a bar William and Teddy stop into.

9/

"Motion Picture Soundtrack" by Radiohead/Vitamin String Quartet

Season 1, Episode 6: "The Adversary"
John P. Johnson/HBO

This Vitamin Sting Quarter instrumental cover plays as Felix takes Maeve through the design and narrative levels and she sees exactly how her existence was manufactured.

10/

"Rêverie" by Claude Debussy (again)

Season 1, Episode 7: "Trompe L'oeil"
HBO

In the same episode where we learn Bernard is a host, the opening scene with his son Charlie in the hospital is staged with this same Debussy music cue.

The song clearly has a strong link to Arnold (Ford's co-founder and the person on which Bernard is based) and the core coding for the hosts.

11/

"House of the Rising Sun" by The Animals

Season 1, Episode 8: "Trace Decay"
HBO

As Maeve interacts with the new version of Clementine, the player piano in the Mariposa plays this cover.

12/

"Back to Black" by Amy Winehouse

Season 1, Episode 8: "Trace Decay"
HBO

Later in the same episode, Maeve tests out her new control over the hosts by directing the bartender and Clementine while Amy Winehouse plays in the background.

13/

"Rêverie" by Claude Debussy (yes, again)

Season 1, Episode 9 "The Well-Tempered Clavier"
HBO

As Teddy remembers "Wyatt," we hear the same Debussy tune. This linked Wyatt back to Arnold, and foreshadowed the revelation about Dolores and the real story of what happened to Arnold all those years ago.

14/

"Candy Castle" by Glass Candy

Season 1, Episode 10: "The Bicameral Mind"
HBO

One of the few examples of a modern song (with lyrics!) playing on "Westworld" happened on the first season finale. When the pervy tech is preparing to have sex with Hector, "Candy Castle" plays in his earbuds.

15/

"Exit Music (For a Film)" by Radiohead

Season 1, Episode 10: "The Bicameral Mind"
HBO

During Ford's big finale speech, yet another Radiohead song builds dramatically in the background. This scene eventually transitions into playing (you guessed it) "Rêverie" once again.

16/

"The Entertainer" by Scott Joplin

Season 2, Episode 1: "Journey Into Night"
HBO

This iconic player piano song served as a discomforting backdrop as the audience saw the destruction in Sweetwater and Dolores gunning down humans on the second season premiere.

17/

"Runaway" by Kanye West

Season 2, Episode 2: "Reunion"
John P. Johnson/HBO

As the second episode transitioned into a flashback of Logan Delos being pitched on Westworld for the first time, the cover of Kanye West's "Runaway" played.

18/

"Nocturne No. 2" by Frédéric Chopin

Season 2, Episode 2: "Reunion"
HBO

Dolores is playing "Nocturne" on the piano during James Delos' retirement party, right before William sees her sitting there.

19/

"The Man I Love" by George Gershwin and Leon Fleisher

Season 2, Episode 2: "Reunion"
HBO

The host known as Clementine plays this 1920s piano composition during Logan's private demonstration. Later in the episode, Dolores plays this song at James Delos' party after he requests "anything but f---ing Chopin."